Tero Kristo | a8acecc | 2013-07-18 11:52:33 +0300 | [diff] [blame] | 1 | /* |
| 2 | * TI clock support |
| 3 | * |
| 4 | * Copyright (C) 2013 Texas Instruments, Inc. |
| 5 | * |
| 6 | * Tero Kristo <t-kristo@ti.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| 13 | * kind, whether express or implied; without even the implied warranty |
| 14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/clk-provider.h> |
| 19 | #include <linux/clkdev.h> |
| 20 | #include <linux/clk/ti.h> |
| 21 | #include <linux/of.h> |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 22 | #include <linux/of_address.h> |
| 23 | #include <linux/list.h> |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 24 | #include <linux/regmap.h> |
| 25 | #include <linux/bootmem.h> |
Tero Kristo | a8acecc | 2013-07-18 11:52:33 +0300 | [diff] [blame] | 26 | |
Tero Kristo | c82f895 | 2014-12-16 18:20:46 +0200 | [diff] [blame] | 27 | #include "clock.h" |
| 28 | |
Tero Kristo | a8acecc | 2013-07-18 11:52:33 +0300 | [diff] [blame] | 29 | #undef pr_fmt |
| 30 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 31 | |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 32 | struct ti_clk_ll_ops *ti_clk_ll_ops; |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 33 | static struct device_node *clocks_node_ptr[CLK_MAX_MEMMAPS]; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 34 | |
Stephen Boyd | 3fe6d69 | 2015-07-15 12:03:52 -0700 | [diff] [blame] | 35 | static struct ti_clk_features ti_clk_features; |
Tero Kristo | f3b19aa | 2015-02-27 17:54:14 +0200 | [diff] [blame] | 36 | |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 37 | struct clk_iomap { |
| 38 | struct regmap *regmap; |
| 39 | void __iomem *mem; |
| 40 | }; |
| 41 | |
| 42 | static struct clk_iomap *clk_memmaps[CLK_MAX_MEMMAPS]; |
| 43 | |
| 44 | static void clk_memmap_writel(u32 val, void __iomem *reg) |
| 45 | { |
| 46 | struct clk_omap_reg *r = (struct clk_omap_reg *)® |
| 47 | struct clk_iomap *io = clk_memmaps[r->index]; |
| 48 | |
| 49 | if (io->regmap) |
| 50 | regmap_write(io->regmap, r->offset, val); |
| 51 | else |
| 52 | writel_relaxed(val, io->mem + r->offset); |
| 53 | } |
| 54 | |
| 55 | static u32 clk_memmap_readl(void __iomem *reg) |
| 56 | { |
| 57 | u32 val; |
| 58 | struct clk_omap_reg *r = (struct clk_omap_reg *)® |
| 59 | struct clk_iomap *io = clk_memmaps[r->index]; |
| 60 | |
| 61 | if (io->regmap) |
| 62 | regmap_read(io->regmap, r->offset, &val); |
| 63 | else |
| 64 | val = readl_relaxed(io->mem + r->offset); |
| 65 | |
| 66 | return val; |
| 67 | } |
| 68 | |
Tero Kristo | a8acecc | 2013-07-18 11:52:33 +0300 | [diff] [blame] | 69 | /** |
Tero Kristo | e9e6308 | 2015-04-27 21:55:42 +0300 | [diff] [blame] | 70 | * ti_clk_setup_ll_ops - setup low level clock operations |
| 71 | * @ops: low level clock ops descriptor |
| 72 | * |
| 73 | * Sets up low level clock operations for TI clock driver. This is used |
| 74 | * to provide various callbacks for the clock driver towards platform |
| 75 | * specific code. Returns 0 on success, -EBUSY if ll_ops have been |
| 76 | * registered already. |
| 77 | */ |
| 78 | int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops) |
| 79 | { |
| 80 | if (ti_clk_ll_ops) { |
| 81 | pr_err("Attempt to register ll_ops multiple times.\n"); |
| 82 | return -EBUSY; |
| 83 | } |
| 84 | |
| 85 | ti_clk_ll_ops = ops; |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 86 | ops->clk_readl = clk_memmap_readl; |
| 87 | ops->clk_writel = clk_memmap_writel; |
Tero Kristo | e9e6308 | 2015-04-27 21:55:42 +0300 | [diff] [blame] | 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
Tero Kristo | a8acecc | 2013-07-18 11:52:33 +0300 | [diff] [blame] | 92 | /** |
| 93 | * ti_dt_clocks_register - register DT alias clocks during boot |
| 94 | * @oclks: list of clocks to register |
| 95 | * |
| 96 | * Register alias or non-standard DT clock entries during boot. By |
| 97 | * default, DT clocks are found based on their node name. If any |
| 98 | * additional con-id / dev-id -> clock mapping is required, use this |
| 99 | * function to list these. |
| 100 | */ |
| 101 | void __init ti_dt_clocks_register(struct ti_dt_clk oclks[]) |
| 102 | { |
| 103 | struct ti_dt_clk *c; |
| 104 | struct device_node *node; |
| 105 | struct clk *clk; |
| 106 | struct of_phandle_args clkspec; |
| 107 | |
| 108 | for (c = oclks; c->node_name != NULL; c++) { |
| 109 | node = of_find_node_by_name(NULL, c->node_name); |
| 110 | clkspec.np = node; |
| 111 | clk = of_clk_get_from_provider(&clkspec); |
| 112 | |
| 113 | if (!IS_ERR(clk)) { |
| 114 | c->lk.clk = clk; |
| 115 | clkdev_add(&c->lk); |
| 116 | } else { |
| 117 | pr_warn("failed to lookup clock node %s\n", |
| 118 | c->node_name); |
| 119 | } |
| 120 | } |
| 121 | } |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 122 | |
| 123 | struct clk_init_item { |
| 124 | struct device_node *node; |
| 125 | struct clk_hw *hw; |
| 126 | ti_of_clk_init_cb_t func; |
| 127 | struct list_head link; |
| 128 | }; |
| 129 | |
| 130 | static LIST_HEAD(retry_list); |
| 131 | |
| 132 | /** |
| 133 | * ti_clk_retry_init - retries a failed clock init at later phase |
| 134 | * @node: device not for the clock |
| 135 | * @hw: partially initialized clk_hw struct for the clock |
| 136 | * @func: init function to be called for the clock |
| 137 | * |
| 138 | * Adds a failed clock init to the retry list. The retry list is parsed |
| 139 | * once all the other clocks have been initialized. |
| 140 | */ |
| 141 | int __init ti_clk_retry_init(struct device_node *node, struct clk_hw *hw, |
| 142 | ti_of_clk_init_cb_t func) |
| 143 | { |
| 144 | struct clk_init_item *retry; |
| 145 | |
| 146 | pr_debug("%s: adding to retry list...\n", node->name); |
| 147 | retry = kzalloc(sizeof(*retry), GFP_KERNEL); |
| 148 | if (!retry) |
| 149 | return -ENOMEM; |
| 150 | |
| 151 | retry->node = node; |
| 152 | retry->func = func; |
| 153 | retry->hw = hw; |
| 154 | list_add(&retry->link, &retry_list); |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * ti_clk_get_reg_addr - get register address for a clock register |
| 161 | * @node: device node for the clock |
| 162 | * @index: register index from the clock node |
| 163 | * |
| 164 | * Builds clock register address from device tree information. This |
Tero Kristo | c807dbe | 2015-02-23 21:06:08 +0200 | [diff] [blame] | 165 | * is a struct of type clk_omap_reg. Returns a pointer to the register |
| 166 | * address, or a pointer error value in failure. |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 167 | */ |
| 168 | void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index) |
| 169 | { |
| 170 | struct clk_omap_reg *reg; |
| 171 | u32 val; |
| 172 | u32 tmp; |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 173 | int i; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 174 | |
| 175 | reg = (struct clk_omap_reg *)&tmp; |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 176 | |
| 177 | for (i = 0; i < CLK_MAX_MEMMAPS; i++) { |
| 178 | if (clocks_node_ptr[i] == node->parent) |
| 179 | break; |
| 180 | } |
| 181 | |
| 182 | if (i == CLK_MAX_MEMMAPS) { |
| 183 | pr_err("clk-provider not found for %s!\n", node->name); |
Stephen Boyd | 412d6b4 | 2015-05-01 12:59:32 -0700 | [diff] [blame] | 184 | return IOMEM_ERR_PTR(-ENOENT); |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | reg->index = i; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 188 | |
| 189 | if (of_property_read_u32_index(node, "reg", index, &val)) { |
| 190 | pr_err("%s must have reg[%d]!\n", node->name, index); |
Stephen Boyd | 412d6b4 | 2015-05-01 12:59:32 -0700 | [diff] [blame] | 191 | return IOMEM_ERR_PTR(-EINVAL); |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | reg->offset = val; |
| 195 | |
| 196 | return (void __iomem *)tmp; |
| 197 | } |
| 198 | |
| 199 | /** |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 200 | * omap2_clk_provider_init - init master clock provider |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 201 | * @parent: master node |
| 202 | * @index: internal index for clk_reg_ops |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 203 | * @syscon: syscon regmap pointer for accessing clock registers |
| 204 | * @mem: iomem pointer for the clock provider memory area, only used if |
| 205 | * syscon is not provided |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 206 | * |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 207 | * Initializes a master clock IP block. This basically sets up the |
| 208 | * mapping from clocks node to the memory map index. All the clocks |
| 209 | * are then initialized through the common of_clk_init call, and the |
| 210 | * clocks will access their memory maps based on the node layout. |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 211 | * Returns 0 in success. |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 212 | */ |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 213 | int __init omap2_clk_provider_init(struct device_node *parent, int index, |
| 214 | struct regmap *syscon, void __iomem *mem) |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 215 | { |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 216 | struct device_node *clocks; |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 217 | struct clk_iomap *io; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 218 | |
| 219 | /* get clocks for this parent */ |
| 220 | clocks = of_get_child_by_name(parent, "clocks"); |
| 221 | if (!clocks) { |
| 222 | pr_err("%s missing 'clocks' child node.\n", parent->name); |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 223 | return -EINVAL; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 224 | } |
| 225 | |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 226 | /* add clocks node info */ |
| 227 | clocks_node_ptr[index] = clocks; |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 228 | |
| 229 | io = kzalloc(sizeof(*io), GFP_KERNEL); |
Stephen Boyd | f645f72 | 2015-07-15 11:55:42 -0700 | [diff] [blame] | 230 | if (!io) |
| 231 | return -ENOMEM; |
Tero Kristo | 989feaf | 2015-04-27 22:23:06 +0300 | [diff] [blame] | 232 | |
| 233 | io->regmap = syscon; |
| 234 | io->mem = mem; |
| 235 | |
| 236 | clk_memmaps[index] = io; |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * omap2_clk_legacy_provider_init - initialize a legacy clock provider |
| 243 | * @index: index for the clock provider |
| 244 | * @mem: iomem pointer for the clock provider memory area |
| 245 | * |
| 246 | * Initializes a legacy clock provider memory mapping. |
| 247 | */ |
| 248 | void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem) |
| 249 | { |
| 250 | struct clk_iomap *io; |
| 251 | |
| 252 | io = memblock_virt_alloc(sizeof(*io), 0); |
| 253 | |
| 254 | io->mem = mem; |
| 255 | |
| 256 | clk_memmaps[index] = io; |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 257 | } |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 258 | |
Tero Kristo | c08ee14 | 2014-09-12 15:01:57 +0300 | [diff] [blame] | 259 | /** |
| 260 | * ti_dt_clk_init_retry_clks - init clocks from the retry list |
| 261 | * |
| 262 | * Initializes any clocks that have failed to initialize before, |
| 263 | * reasons being missing parent node(s) during earlier init. This |
| 264 | * typically happens only for DPLLs which need to have both of their |
| 265 | * parent clocks ready during init. |
| 266 | */ |
| 267 | void ti_dt_clk_init_retry_clks(void) |
| 268 | { |
| 269 | struct clk_init_item *retry; |
| 270 | struct clk_init_item *tmp; |
| 271 | int retries = 5; |
| 272 | |
| 273 | while (!list_empty(&retry_list) && retries) { |
| 274 | list_for_each_entry_safe(retry, tmp, &retry_list, link) { |
| 275 | pr_debug("retry-init: %s\n", retry->node->name); |
| 276 | retry->func(retry->hw, retry->node); |
| 277 | list_del(&retry->link); |
| 278 | kfree(retry); |
| 279 | } |
| 280 | retries--; |
Tero Kristo | 819b486 | 2013-10-22 11:39:36 +0300 | [diff] [blame] | 281 | } |
| 282 | } |
Tero Kristo | c82f895 | 2014-12-16 18:20:46 +0200 | [diff] [blame] | 283 | |
Arnd Bergmann | 6793a30a | 2015-02-03 17:59:32 +0100 | [diff] [blame] | 284 | #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS) |
Tero Kristo | c82f895 | 2014-12-16 18:20:46 +0200 | [diff] [blame] | 285 | void __init ti_clk_patch_legacy_clks(struct ti_clk **patch) |
| 286 | { |
| 287 | while (*patch) { |
| 288 | memcpy((*patch)->patch, *patch, sizeof(**patch)); |
| 289 | patch++; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | struct clk __init *ti_clk_register_clk(struct ti_clk *setup) |
| 294 | { |
| 295 | struct clk *clk; |
| 296 | struct ti_clk_fixed *fixed; |
| 297 | struct ti_clk_fixed_factor *fixed_factor; |
| 298 | struct clk_hw *clk_hw; |
| 299 | |
| 300 | if (setup->clk) |
| 301 | return setup->clk; |
| 302 | |
| 303 | switch (setup->type) { |
| 304 | case TI_CLK_FIXED: |
| 305 | fixed = setup->data; |
| 306 | |
| 307 | clk = clk_register_fixed_rate(NULL, setup->name, NULL, |
| 308 | CLK_IS_ROOT, fixed->frequency); |
| 309 | break; |
Tero Kristo | 7c18a65 | 2014-12-16 18:20:47 +0200 | [diff] [blame] | 310 | case TI_CLK_MUX: |
| 311 | clk = ti_clk_register_mux(setup); |
| 312 | break; |
Tero Kristo | d96f774 | 2014-12-16 18:20:50 +0200 | [diff] [blame] | 313 | case TI_CLK_DIVIDER: |
| 314 | clk = ti_clk_register_divider(setup); |
| 315 | break; |
Tero Kristo | b26bcf9 | 2014-12-16 18:20:52 +0200 | [diff] [blame] | 316 | case TI_CLK_COMPOSITE: |
| 317 | clk = ti_clk_register_composite(setup); |
| 318 | break; |
Tero Kristo | c82f895 | 2014-12-16 18:20:46 +0200 | [diff] [blame] | 319 | case TI_CLK_FIXED_FACTOR: |
| 320 | fixed_factor = setup->data; |
| 321 | |
| 322 | clk = clk_register_fixed_factor(NULL, setup->name, |
| 323 | fixed_factor->parent, |
| 324 | 0, fixed_factor->mult, |
| 325 | fixed_factor->div); |
| 326 | break; |
Tero Kristo | f187616 | 2014-12-16 18:20:48 +0200 | [diff] [blame] | 327 | case TI_CLK_GATE: |
| 328 | clk = ti_clk_register_gate(setup); |
| 329 | break; |
Tero Kristo | ed405a2 | 2015-01-29 22:24:28 +0200 | [diff] [blame] | 330 | case TI_CLK_DPLL: |
| 331 | clk = ti_clk_register_dpll(setup); |
| 332 | break; |
Tero Kristo | c82f895 | 2014-12-16 18:20:46 +0200 | [diff] [blame] | 333 | default: |
| 334 | pr_err("bad type for %s!\n", setup->name); |
| 335 | clk = ERR_PTR(-EINVAL); |
| 336 | } |
| 337 | |
| 338 | if (!IS_ERR(clk)) { |
| 339 | setup->clk = clk; |
| 340 | if (setup->clkdm_name) { |
| 341 | if (__clk_get_flags(clk) & CLK_IS_BASIC) { |
| 342 | pr_warn("can't setup clkdm for basic clk %s\n", |
| 343 | setup->name); |
| 344 | } else { |
| 345 | clk_hw = __clk_get_hw(clk); |
| 346 | to_clk_hw_omap(clk_hw)->clkdm_name = |
| 347 | setup->clkdm_name; |
| 348 | omap2_init_clk_clkdm(clk_hw); |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | return clk; |
| 354 | } |
| 355 | |
| 356 | int __init ti_clk_register_legacy_clks(struct ti_clk_alias *clks) |
| 357 | { |
| 358 | struct clk *clk; |
| 359 | bool retry; |
| 360 | struct ti_clk_alias *retry_clk; |
| 361 | struct ti_clk_alias *tmp; |
| 362 | |
| 363 | while (clks->clk) { |
| 364 | clk = ti_clk_register_clk(clks->clk); |
| 365 | if (IS_ERR(clk)) { |
| 366 | if (PTR_ERR(clk) == -EAGAIN) { |
| 367 | list_add(&clks->link, &retry_list); |
| 368 | } else { |
| 369 | pr_err("register for %s failed: %ld\n", |
| 370 | clks->clk->name, PTR_ERR(clk)); |
| 371 | return PTR_ERR(clk); |
| 372 | } |
| 373 | } else { |
| 374 | clks->lk.clk = clk; |
| 375 | clkdev_add(&clks->lk); |
| 376 | } |
| 377 | clks++; |
| 378 | } |
| 379 | |
| 380 | retry = true; |
| 381 | |
| 382 | while (!list_empty(&retry_list) && retry) { |
| 383 | retry = false; |
| 384 | list_for_each_entry_safe(retry_clk, tmp, &retry_list, link) { |
| 385 | pr_debug("retry-init: %s\n", retry_clk->clk->name); |
| 386 | clk = ti_clk_register_clk(retry_clk->clk); |
| 387 | if (IS_ERR(clk)) { |
| 388 | if (PTR_ERR(clk) == -EAGAIN) { |
| 389 | continue; |
| 390 | } else { |
| 391 | pr_err("register for %s failed: %ld\n", |
| 392 | retry_clk->clk->name, |
| 393 | PTR_ERR(clk)); |
| 394 | return PTR_ERR(clk); |
| 395 | } |
| 396 | } else { |
| 397 | retry = true; |
| 398 | retry_clk->lk.clk = clk; |
| 399 | clkdev_add(&retry_clk->lk); |
| 400 | list_del(&retry_clk->link); |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
Arnd Bergmann | 6793a30a | 2015-02-03 17:59:32 +0100 | [diff] [blame] | 407 | #endif |
Tero Kristo | f3b19aa | 2015-02-27 17:54:14 +0200 | [diff] [blame] | 408 | |
| 409 | /** |
| 410 | * ti_clk_setup_features - setup clock features flags |
| 411 | * @features: features definition to use |
| 412 | * |
| 413 | * Initializes the clock driver features flags based on platform |
| 414 | * provided data. No return value. |
| 415 | */ |
| 416 | void __init ti_clk_setup_features(struct ti_clk_features *features) |
| 417 | { |
| 418 | memcpy(&ti_clk_features, features, sizeof(*features)); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * ti_clk_get_features - get clock driver features flags |
| 423 | * |
| 424 | * Get TI clock driver features description. Returns a pointer |
| 425 | * to the current feature setup. |
| 426 | */ |
| 427 | const struct ti_clk_features *ti_clk_get_features(void) |
| 428 | { |
| 429 | return &ti_clk_features; |
| 430 | } |
Tero Kristo | a5aa8a6 | 2015-03-03 10:51:01 +0200 | [diff] [blame] | 431 | |
| 432 | /** |
| 433 | * omap2_clk_enable_init_clocks - prepare & enable a list of clocks |
| 434 | * @clk_names: ptr to an array of strings of clock names to enable |
| 435 | * @num_clocks: number of clock names in @clk_names |
| 436 | * |
| 437 | * Prepare and enable a list of clocks, named by @clk_names. No |
| 438 | * return value. XXX Deprecated; only needed until these clocks are |
| 439 | * properly claimed and enabled by the drivers or core code that uses |
| 440 | * them. XXX What code disables & calls clk_put on these clocks? |
| 441 | */ |
| 442 | void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks) |
| 443 | { |
| 444 | struct clk *init_clk; |
| 445 | int i; |
| 446 | |
| 447 | for (i = 0; i < num_clocks; i++) { |
| 448 | init_clk = clk_get(NULL, clk_names[i]); |
| 449 | if (WARN(IS_ERR(init_clk), "could not find init clock %s\n", |
| 450 | clk_names[i])) |
| 451 | continue; |
| 452 | clk_prepare_enable(init_clk); |
| 453 | } |
| 454 | } |